Home Secretary Suella Braverman was warned 4 times successful September and October her section was perchance breaking the instrumentality by holding migrants astatine Kent's Manston centre, MPs person heard.
Previous reports suggested Ms Braverman was told failing to supply alternate accommodation was successful breach of the law.
Ms Braverman told the Home Affairs Select Committee she would not remark connected leaked documents.
However, she said she was alert from September Manston had a problem.
Manston was designed arsenic a holding tract for a maximum of 1,600 migrants who get connected tiny boats - each for a maximum of 24 hours - but astatine its highest determination were 4,000 radical there.
In October, inspectors recovered families who had been sleeping connected mats successful the marquees for weeks.
On Tuesday, the Home Office confirmed the tract had been cleared, helped by atrocious upwind successful the English Channel causing a sustained autumn successful the fig of crossings.
Dame Diana Johnson, who chairs the Home Affairs Select Committee, said Ms Braverman was told connected 15 and 22 September, and 1 and 4 October, that the Home Office did not person the powerfulness to detain migrants waiting for onward accommodation.
'Failed' borderline control
Answering a question astir asylum seekers successful hotels, she said: "We person failed to power our borders, yes, and that's wherefore the premier curate and myself are perfectly determined to hole this problem."
The committee heard that 36 radical who had been held successful Manston had been returned to Albania, nether the government's statement to instrumentality migrants and offenders,
Dan O'Mahoney, the Home Office's clandestine transmission menace commander, besides said determination was 1 Albanian constabulary serviceman moving with officials astatine the Kent camp.
The location caput is aiming to quadruple the complaint astatine which asylum cases are processed by unit arsenic the authorities attempts to tackle the backlog successful the system.
Ms Braverman told the committee that, connected average, each unit subordinate was deciding 1 asylum lawsuit per week astatine present.
The Home Office has doubled the fig of asylum unit to much than 1,000 and plans to enlistee different 500 decision-makers by March.
Ms Braverman said: "We privation to present sustainable changes to scope a minimum of 3 decisions, per determination maker, per week by May."
The ambition is 4 decisions per week, she added.
Rwanda policy
Ms Braverman was besides pushed by MPs connected the government's argumentation to nonstop immoderate asylum seekers to Rwanda successful a bid to trim the numbers crossing the Channel.
The plan, nether which the UK has paid Rwanda £140m, is presently connected clasp arsenic it faces a ineligible situation successful the court.
The location caput insisted she inactive had assurance successful the strategy and believed the courts would regularisation it to beryllium legal.
Matthew Rycroft, the astir elder civilian servant successful the Home Office, said it did not yet person grounds the strategy would beryllium worth for money.