The first quote translates as:
"As the battalions were only deployed to occupied territories in exceptional cases, they were only assigned field post numbers in exceptional cases and starting with the time of their deployment".
(The "Fp." on its own does not make sense; I assume that it should say "Fp.-Nrn." or "Fp.-Nummern".)
The first sentence of the second quote does not really make sense. Either one or several words are missing or there is some other error in the transcription. Please re-check the source. The second sentence translates as:
"Around the turn of the year 1944/45, another two battalions were raised."