if they said that the application is in process, that means it is with a caseworker. That also might means that it is in the caseworking unit and waiting to be seen by a senior caseworker.
all cases are being seen by a senior caseworker after been seen by a junior caseworker
however this whole process should be done within 14 weeks. If it goes more than 14 weeks you might like to contact your local MP. if your local MP writes to HO, they have to reply within certain time
from my experience I have seen so far that the HO tend to refuse the application if the application owner got his/her MP involved. That is totally my observation from the cases I have seen so far.
The Immigration Appeal Tribunal has made a key decision on long term residence application and allowed an appeal of a person who has got 4 months gap within 10 years period. you might read the whole desicion from the following link
http://www.ait.gov.uk/Public/Unreported/IA015102009.doc