It sounds to me like that should be accurate, EpicHookMaster.
Every stipend so far I have started with 4k RP, 10k IP.
If you had spent 975 on 2 champions, that should be 1950 spent. That should mean you're down to... 2050.
Doesn't seem like 3050 is an accurate number.
Also - they only give 2k's or 4k's it seems. There's even less reason as to why you should have 5000 RP to start, it should've been either 4k RP or 6k RP (as Wagons had if combined, above). Though - those numbers depend on when you joined.
I think you're okay! Even if you had 5k RP - I don't think you were supposed to have 5k RP, so if they removed 1k RP, it was just to equalize your RP to the amount everyone else received.
I hope any of this information helps!