Sipah-e-Sahabah got involved in politics and entered elections while Lashkar-e-Janghwee abstained from politics and later became militant and that's why they split.
Anyone here from Nagan Chowrangi (Karachi) and goes to Sididiq-e-Akbar Masjid, are they still Sipah-e-Sahaba? In our younger days we used to do there just to listen to Maulana Ali Sher Haideri curse the Shia and then the Shia used to shoot into the Masjid during Taraweeh with AK47 fire and Sunni used to shoot back and Taraweeh used to get interrupted.
Lot of fun in the 1980s.
P.S: I had to google this after posting...
Masjid is still here
And still the headquarters of Sipah-e-Sahaba