T2 ICT Extension approved but not sure if the category is ok

[T2ILR2012]

Dear All,

I applied for T2 ICT VISA extension few weeks back and got the BRP today.

I provided bio-metrics on 16th April 2013 and the letter of approval was issued on 9th May, which to be honest, as per my previous experience with UKBA was bit sooner than expected.

Anyways, My previous leave to remain was under T2 ICT Long term staff category. The VISA history is as follows.

2008 - 2010 Work Permit.
2010 - 2011 T2 ICT (Applied for extn within UK)
2011 - 2012 T2 ICT EST Staff (Applied for extn within UK)
2012 - 2013 T2 ICT Long Term Staff (Applied for extn within UK)

I checked my BRP and my leave to remain has been issued under T2 ICT EST Staff category. I am not sure if that's correct especially since my previous leave to remain was under Long Term staff category. I don't think T2 ICT EST staff category exists any more so not sure what's going on. I'll probably write to UKBA as well but just wanted to check if anybody has faced this before and if this is an issue at all.

Please could you help me out and provide your valuable opinions on this?

Best Regards,