Cotyledon cancer?

Hi
 
I have some Cotyledons (Pig's Ear) in a south-facing slope that are showing signs of abnormal growth. Instead of the normal two leaves/buds on the tip of the stem they are sudenly sprouting masses of tiny pairs. It is almost as if the plants have a cancer of sorts. In summer the plants get plenty of sunlight but in winter (now) they get afternoon sun only and have been subject to lots of rain. The slope is sandy and thus well-drained
 
Has anyone had the same experience?
 
Do I need to reposition or remove and destroy the plants? If it is a disease I do not want to infect other stands of the plant nearby.
 
Charl
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