Anyone's monthly payment fluctuating?

Logged in to open 24 a couple of days ago & saw that our monthly payment has risen by €26.

When we were first adjusted it came in at higher than I expected, then dropped to pretty much what I thought it should have been & now today it's gone back up.

I'm confused as to the reason it's gone up again. Rates haven't changed & TRS is still in play for another year.

Are they just playing silly buggers again?

I got a letter Friday, saying mine was going down another 45 euro, something to do with the TRS, they could of being estimating what people where entitled to,